1210786740 has 144 divisors (see below), whose sum is σ = 3777725952. Its totient is φ = 313747968.

The previous prime is 1210786739. The next prime is 1210786771. The reversal of 1210786740 is 476870121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1210786695 and 1210786704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1412392 + ... + 1413248.

It is an arithmetic number, because the mean of its divisors is an integer number (26234208).

Almost surely, 2^1210786740 is an apocalyptic number.

1210786740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210786740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888862976).

1210786740 is an abundant number, since it is smaller than the sum of its proper divisors (2566939212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1210786740 is a wasteful number, since it uses less digits than its factorization.

1210786740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 1210786740 is about 34796.3610166351. The cubic root of 1210786740 is about 1065.8331376677.

The spelling of 1210786740 in words is "one billion, two hundred ten million, seven hundred eighty-six thousand, seven hundred forty".